chore: fix all Biome lint warnings and MedDetail intake bell icons (#265)

- Backend: refactor nested ternaries, remove unused imports/any types
- Frontend: fix exhaustive deps, a11y label associations, array index keys,
  empty CSS blocks, unused vars, type annotations
- MedDetail modal: fix intake schedule bell icons not rendering (use unified
  intake source with fallback), place bell inline after person name
- MedDetail modal: revert schedule rows from grid to flexbox layout

Closes #264

backend/src/services/reminder-scheduler.ts

@@ -167,11 +167,12 @@ async function getMedicationsNeedingReminder(
 		}
 		takenDoseIdsByMed.get(medId)!.add(dose.doseId);
 		const rawTakenAt = Number(dose.takenAt);
-		const takenAtMs = Number.isFinite(rawTakenAt)
-			? rawTakenAt < 1_000_000_000_000
-				? rawTakenAt * 1000
-				: rawTakenAt
-			: new Date(dose.takenAt).getTime();
+		let takenAtMs: number;
+		if (Number.isFinite(rawTakenAt)) {
+			takenAtMs = rawTakenAt < 1_000_000_000_000 ? rawTakenAt * 1000 : rawTakenAt;
+		} else {
+			takenAtMs = new Date(dose.takenAt).getTime();
+		}
 		takenDoseTimestamps.set(dose.doseId, takenAtMs);
 	}
 
@@ -216,7 +217,14 @@ async function getMedicationsNeedingReminder(
 				const intake = intakes[blisterIdx];
 				const intakePerson = intake?.takenBy;
 				const fallbackPeople = parseTakenByJson(row.takenByJson);
-				const peopleForThisIntake = intakePerson ? [intakePerson] : fallbackPeople.length > 0 ? fallbackPeople : [null];
+				let peopleForThisIntake: Array<string | null>;
+				if (intakePerson) {
+					peopleForThisIntake = [intakePerson];
+				} else if (fallbackPeople.length > 0) {
+					peopleForThisIntake = fallbackPeople;
+				} else {
+					peopleForThisIntake = [null];
+				}
 
 				let timeBasedConsumed = 0;
 				let lastAutoConsumedDateMs = 0;